<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap Example</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="bootstrap/3.3.7/css/bootstrap.min.css">
<script src="jquery/2.1.1/jquery.min.js"></script>
<script src="bootstrap/3.3.7/js/bootstrap.min.js"></script>
<style>
body {
	position: relative;
}

#section1 {
	padding-top: 50px;
	height: 500px;
	color: #fff;
	background-color: #1E88E5;
}

#section2 {
	padding-top: 50px;
	height: 500px;
	color: #fff;
	background-color: #673ab7;
}

#section3 {
	padding-top: 50px;
	height: 500px;
	color: #fff;
	background-color: #ff9800;
}

#section41 {
	padding-top: 50px;
	height: 500px;
	color: #fff;
	background-color: #00bcd4;
}

#section42 {
	padding-top: 50px;
	height: 500px;
	color: #fff;
	background-color: #009688;
}
</style>
</head>
<body data-spy="scroll" data-target=".navbar" data-offset="50">

	<nav class="navbar navbar-inverse navbar-fixed-top">
		<div class="container-fluid">
			<div class="navbar-header">
				<button type="button" class="navbar-toggle" data-toggle="collapse"
					data-target="#myNavbar">
					<span class="icon-bar"></span> <span class="icon-bar"></span> <span
						class="icon-bar"></span>
				</button>
				<a class="navbar-brand" href="#">WebSiteName</a>
			</div>
			<div>
				<div class="collapse navbar-collapse" id="myNavbar">
					<ul class="nav navbar-nav">
						<li><a href="#section1">Section 1</a></li>
						<li><a href="#section2">Section 2</a></li>
						<li><a href="#section3">Section 3</a></li>
						<li class="dropdown"><a class="dropdown-toggle"
							data-toggle="dropdown" href="#">Section 4 <span class="caret"></span></a>
							<ul class="dropdown-menu">
								<li><a href="#section41">Section 4-1</a></li>
								<li><a href="#section42">Section 4-2</a></li>
							</ul></li>
					</ul>
				</div>
			</div>
		</div>
	</nav>

	<div id="section1" class="container-fluid">
		<h1>Section 1</h1>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
	</div>
	<div id="section2" class="container-fluid">
		<h1>Section 2</h1>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
	</div>
	<div id="section3" class="container-fluid">
		<h1>Section 3</h1>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
	</div>
	<div id="section41" class="container-fluid">
		<h1>Section 4 Submenu 1</h1>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
	</div>
	<div id="section42" class="container-fluid">
		<h1>Section 4 Submenu 2</h1>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
		<p>Try to scroll this section and look at the navigation bar while
			scrolling! Try to scroll this section and look at the navigation bar
			while scrolling!</p>
	</div>

</body>
</html>